I support you completely. We have to stand up for our rights! Not sure how good your English is. If your English is good enough to go thru this by yourself, you have my blessing and wish you all the best! As you said, 即便输了,也心服口服.
If you need someone to translate Chinese to English, I volunteer to be your translator!
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For paint, only around $16 each bucket (from Canadian Tire, Wal Mart or Home Depot). If all your rooms are large, you will need 6 buckets, even that's less than $100.